Paleogeographic Background -- Geological Settings of the Major Fossil Localities in South America and Antarctica -- The Nature of the Fossil Record of Birds -- The Paleogene Birds of South America -- Eocene Birds from Antarctica and Their Relationships with Those of South America -- Neogene Birds of South America -- The Dominance of Zoophagous Birds: Just a Cliché? -- Bio-Connections Between Southern Continents: What is and What is Not Possible to Conclude.